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Phil Davis |
9:30 30 Sep 02 |
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David B. Mark |
15:14 29 Sep 02 |
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Phil Davis |
17:46 29 Sep 02 |
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howard schwartz |
13:42 29 Sep 02 |
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Phil Davis |
17:29 29 Sep 02 |
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David B. Mark |
8:45 27 Sep 02 |
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Re: Determining EFS for low contrast film-developer combinations |
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Phil Davis |
11:32 27 Sep 02 |
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David --
You've raised a good issue. Although the Plotter can't establish a reference "ISO" speed point without considering curves that straddle the 0.62 gradient, it can mark the speed points on the individual curves. Of course they're meaningless without the ISO reference.
We can get around that by "calibrating" the test conditions to establish 2.4 (or some other specific) step tablet density (on the x-axis) as a generic ISO reference. Once that's been done it can be used to assign _relative_ EFS values to the speed points on the individual curves.
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David B. Mark |
14:46 29 Sep 02 |
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Phil Davis |
17:26 29 Sep 02 |
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Phil Davis |
20:11 23 Sep 02 |
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